Taper-plug valve.



Patentd Apk 23 C W LARNER TAPER PLUG VALVE.

APPLICATIONv FILED SEPT. 4. 19u.

@ESTER W. LARNJER, 0F CLEVELAND, OHIO.

TAPlER-PLLUG VALVE.

maaar,

To all whom t may concern: y

iBe it known that ll, CHESTER W. LARNER, a citizen of the United..States, residing at Cleveland, in the county of Cuyahoga and State ofhio, have invented certain new and useful llmprovements in Taper-PlugValves, of which the following is a specification.

rllhis invention relates to multiple-way` and straight-way valves forcontrolling the transmission of gases and fluids under pressure, andmore particularly to taper plug valves of the balanced type.

One of the principal objects is to improve the general construct-ion ofthe valve; to provide for relieving the wedging action thus making theplug easy to turn; and to provide for turning or operating it by thepressure of the gas or fluid in the pipe line 1n which it is installed,or by the pressure of gas or fiuid supplied from an independent source,or by mechanical or electro-magnetic devices constructed and operated ina manner well understood. v

Other objects, lfeatures and advantages will be pointed out in thecourse of the following description taken in connection with theaccompanying drawing, forming a part hereof, wherein- Figure 1 is asectional elevational view of la taper plug valve constructed inaccordance with my invention. y

Fig. 2 is a section on line 2-2 of Fig. 1.'

`The drawing illustrates a four-way valve, but the improvements areequally applicable to straight-way valves.r g y 5jdes1gnates a shell orcasing having supply and exhaust passages 6 and 7 and complemental`outlets 8 and 9. 10 is a taper plug ported as usual for controlling thedistribution of flow throu h the valve casing and having a wedge fit1n,` the plug bore thereof. The casing is provided with an upwardlydirected cylindrical extension 11, which together with its cap 12 formsa chamber for Huid pressure. 'llhe large end of the plug is providedwith a flange or' collar 13, which divides said chamber into u per andlower compartments, whereof the ower compartment or chamber 14 receivespressure for plug balancing and lifting purposes. Below the plug thereis a pressure balancing cham- Evidently,

specificati@ of Letters recent. Y V.Patented apr. 23, 191..Applicatloirled September 4,1191?. Serial No. 189,532.

ber 15. The chambers 14 and 15 are pro- I vided, respectively with ports16 and 17 communicating with the pressure passage 6. whenever there ispressure in the pipe line there is pressure in said chambers. The plugstem 18 is accommodated in a central opening 19 in the cap 12, andcarries an indicator arm 20. The opening Yis closed by an adjustingscrew 21, its lock nut 22 and by a small stufling box 23. Between theadjusting screw 21 and a shoulderon the stem there is a series ofanti-friction balls 24c to take the thrust without undue friction.

The covering plate or cap 12 is provided with a depending radialpartition, wing or abutment 25, and the collar 13 is provided with acorresponding upstanding abutment 26. '.lhe abutment 25 on the. cap is,of course, stationary, since the cap is fixed to the casing. Theabutment 26 rotates with the plug and at each end of its travelencounters steps 27 and 28 on the valve casing. The plug abutment has aclearance of 'say one=six teenth of-an inch with the inside surface ofAthe cap, and the abutment on the latter has the Same clearance withrespect to the top surface of the flange or collar 13, the clear-4 ancesbeing indicated at w. These clearances permit the plug to rise' slightlyfromv example, the chambers 29 and 30 formed. on either sideof the fixedabutment 25, are

provided with ports 31 ladapted and arranged for communication with themain supply passage 6. The ports 31 are equipped with needle valves 32by means of which the How may be throttled to any desired extent.,-

The operating chambers 29 and 30, are provided with outlets 33, whichmay be controlled either by small hand operated valves valves if theplug valve is to be operated i or by, for example, electrically operatedI from a remote point. v Such auxiliary devices being well known and ofobvious construction it has not been-deemed necessary to 35 is providedVlugs 38jon the K commission.

* chamber llfrom lthat toward show them. v

-Thelowerend of the casing is equipped with an adjusting screw 34, whichextends through a plug and may be used eitherto unseat the'taper plug orto be so adjusted together with its centering point 36 as to `act as athrust bearingandfto prevent the v.av., ljusting screw 34 and -plug 35.

In the present embodiment, the supply is shown connected with outlet No.1, and the exhaust with outlet No. l2; If, now, it is desired to operatethe valve" and reverse these connections, or, if inthe case of a'straight-wayvalve it should be desired to close it from the openposition,

or Vice-versa, own) in the outof the operating which the rotattheauxiliary Valve (not sli let .33 on the opposite side lng wing orabutment is turned, is opened.

'The pressure in 'that side ofthe operating chamber `limmediately dropsbecause the y pressureinlet is throttled and the area of outlet. v Inaddition to this, the other chamber drops sf mlet is very much less'than the ,area of Athe pressure in count `of leakage through the"clearance spaces m. The pressure 1in' chambers 14 and l 15,hoW.ever, isnot reduced andthe-result,

the wing or abutment y -around until it encounters the stop at thewhereupon the :pressure therefore, from its seat until the vleakage'between is that the taper plugis lifted p lclearance spaces a: areclosed'or substantially closed. The taper lplug'having thus been4unwedged is free to turn and does turn due to the'pressure on 26,l whichswings other end of its'stroke.

IThe auxiliary-valve controlling the outlet ,33 is then closed,

normal-.in the operating chamber and forces the plug back to itsoriginal position, wedging it in the taper bore and eliminating all theseveral ports ofthe valve casing.vv

The force tending to seat the plug equal to the operating pressure-multiplied-by the dilierence between thefdiameter of the ph'lg at thelarge' 'end-and "the diameter= a the "I smallcend.v The force tending toseatthe 1 plug,.the force tending to unseat the plug, .anddhe forcetendmg to rotate the plug,

builds up again to.

large end may all be varied to suit the conditions of operation byvarying "the taper of the plug andthe diameter and length of thecylindrical operating chamber lbetween the plug and the cap.v

The indicator arm 20 is useful to show indicate its electrically.

Having thus described my invention, what I claim is- 1.` The combinationin a valve kkof the type recited, ofa rotary taper plug and itscomplemental casing, means for relieving the wedgingaction of the plug,and means for turnlng it with fluid pressure.

2. The combination in a valve of the type recited, of a rotary taperplug and'its complemental casing, pressure operated means or unwedgingthe plug, pressure. operated means for turning it, and pressure operatedmeans for re-.wedging it.

3. The combination in a valve of the type recited, of a rotary taperplug and its compositipn at, some distant point plemental casing, meansfor relieving the wedging action of the plug, means for turning it withuid pressure, and means for effecting manual adjustments thereof.

4. lThe combination in a valve of the type recited, of a rotary taperplug and its complemental casing, means for relieving the wedging actionof the plug, means for turning it'rwith fluid pressure, and an arm forindicating the position of the plug and constituting means for turningitmanually.

5. The combination in a valve of thetype recited, of a rotary taper plughaving its large end provided with an annular flange or collar, a valvecasing having a chambered part to receive said collar and equipped withpressure linlets and outlets, an abutment on the collar, and means forrelieving the wedging action of the 'plug whereby it may be turned inresponse to pressure applied to the abutment.. i

6. The combination in a valve of the type recited, of a rotary taperplug whereof one end is provided with a radial wing or abutment, a valvecasinghaving a chamber for said abutment provided with pressure inletsand outlets, and means for relieving the wedging action of the plugwhereby it may be turned inresponse to pressure applied to the abutment.

7. The combination in a valve of the type.

recited, of a .rotary taper plug having its rovided with an endwisedirected Wing or a utment, avalve casing having a chamber for saidabutment with pressure inlets and outlets, means for manipulating themto shift the abutment, and pressure balancing chambers at bothv ends ofthe plug.

8. A valve of the type recited, comprising the combination of a taperplugcapable of the position of thetaper plug locally or to;l

rotary and also endwise movement, its cas- A discharge connections foroperating the last ing having an o'set pressure chamber promentioneolabutment. o 2W vided With a cap, abutments in said .chamber In testimonywhereof ll ax my signature whereof one is Xecl to the cap and the otherin the presence of two Witnesses.

5 is carried by the plug and each having a CHESTER W. LNER.

clearance space to admit ofkendwise move- Witnesses: ment of the plug,complemental stops for FRANK REED,

the plug abutment, and pressure supply 'and L. M. SMYTH.

